Q. 6 DEFINE THE FOLLOWINGS
1. Teflon 2. Polymer 3. Biodegradable materials
5. Fossil fuels 6. Calorific value
4. Carbonisation
Answers
Answer:
1) Teflon = Teflon is a brand name of a chemical coating, polytetrafluoroethylene ( shortened and called PTFE). It was first made in the 1930s to create a non-reactive, nonstick surface. It's known for its use in cookware, although it can also be used to coat other materials like wires or fabrics to make them waterproof.
2) Polymer = A polymer is a substance or material consisting of very large molecules, or macro molecules, composed of many repeating sub units. Due to their broad spectrum of properties, both synthetic and natural polymers play essential and ubiquitous roles in everyday life.
3) Biodegradable materials = Biodegradable wastes are such waste materials which are and can be degraded by natural factors like microbes (e.g. bacteria, fungi and few more), abiotic elements like temperature, UV, oxygen, etc. Some examples of such wastes are food materials, kitchen wastes, and other natural wastes.
4) Fossil fuels = Fossil fuels include coal, petroleum, natural gas, oil shale, bitumen, tar sands, and heavy oils. All contain carbon and were formed as a result of geologic processes acting on the remains of organic matter produced by photosynthesis, a process that began in the Archean Eon.
5) Calorific value = The amount of heat released by a unit weight or unit volume of a substance during complete combustion is known as calorific value.
6) Carbonisation = Carbonization is the conversion of organic matters like plants and dead animal remains into carbon through destructive distillation.
Hope my answer will help u
Answer:
- a tough synthetic resin made by polymerizing tetrafluoroethylene, chiefly used to coat non-stick cooking utensils and to make seals and bearings.